Lowering Freezing Point With Salt

Materials

1

Difficulty

1

Safety

1

An ice cube is put on some salt, and another not put on salt as a control. The salt one melts first because the freezing point of water is depressed.

Notes

Shows why salt is put on roads to melt snow. Can also do demonstration where water and salt water are both frozen, but this takes longer. Can also add salt to tub of ice and compare the temperature with a control.